Do Microplastics Cause Harm? An Honest Look at the Current Evidence

The gentle scrape of a knife against a cutting board is a familiar sound in any kitchen. But what if that sound carried a hidden health risk?

The Microplastic Mystery

Microplastics are a hot topic, with many parents asking if these tiny particles could be harmful to their family. The headlines often sound alarming, but what do we really know? The honest answer is that while microplastics are suspected to affect health, the science is still emerging, and much of it is based on animal studies. This means we're in the early days of understanding their impact.

What Are Microplastics?

Microplastics are small particles less than 5mm in size, often resulting from the breakdown of larger plastic items. They've been found in various places, including the ocean, drinking water, and even the air we breathe. One significant source of concern in households is cutting boards, where plastic boards can shed particles when chopped on.

The Cutting Board Conundrum

A 2023 study in Environmental Science & Technology estimated a plastic chopping board could shed up to ~50 grams of microplastics per person per year, under the study's assumptions. However, it's crucial to note that this study also found no adverse effects on the viability of mouse fibroblast cells after exposure to these microplastics for 72 hours, indicating that the health effects, if any, are not yet established.

The Big Question: Harm?

So, do microplastics cause harm? A 2024 systematic review in Environmental Science & Technology concluded that microplastics are 'suspected' to affect human digestive, reproductive, and respiratory health, with a suggested link to colon and lung cancer. It's important to stress that this is largely based on animal studies, and the authors themselves note that research on microplastics and human health is still in its infancy.

The Diet Dilemma

One widely cited 2021 study in the Journal of Hazardous Materials estimated people may ingest up to ~5 grams of microplastics a week — about the weight of a credit card — though this is an upper-end estimate based on conservative assumptions, and it measures exposure, not harm. It's a reminder that microplastics are pervasive, but it doesn't tell us about their health effects.

What This Means for Your Kitchen

Given the current state of research, it's wise to reduce needless exposure to microplastics without causing undue alarm. In the kitchen, this might mean choosing cutting boards made from materials that don't shed microplastics, such as wood, glass, or titanium. When I first read the study, I went and looked at my own board and decided to switch to a titanium board, which, while softer than hardened knife steel, develops a natural patina over time that I've come to appreciate as a mark of use, not a defect.

FAQ: Microplastics and Your Health

Q: Are microplastics in my food dangerous? A: Current research suggests microplastics are suspected to potentially affect health, but the evidence is mostly from animal studies, and the science is still emerging.

Q: How can I reduce microplastic exposure in my home? A: Opt for cutting boards made from materials that don't shed microplastics, and be conscious of the plastics you use in your daily life.

Q: Can I get rid of all microplastics? A: It's nearly impossible to eliminate all microplastics, but taking steps to reduce exposure is a prudent precaution.

Q: Are there safe alternatives to plastic cutting boards? A: Yes, materials like wood, glass, and titanium are good options. Each has its benefits and considerations, but they don't contribute to microplastic pollution in the same way.

A Final Thought

In the face of uncertainty, it's natural to seek answers. The current evidence on microplastics suggests we should be cautious and reduce exposure where we can. As a parent, I understand the desire to protect our families, and taking practical steps in the kitchen is one way we can all contribute to a healthier environment.

Written by Adam Oliver, founder of Perfect Titanium.